addison



E. R. ADDISGNL Lamp Chimney.

hizemw- 4 J6 P/ZEW 6% fw ".PEI'ERS, PHDTO-LITHOGRAPHER. WASHINGTON. D. C,

Patented Nov. 19, I867.

gains .tatrs gaunt ffitr.

E. R.- ADDISON, OF WHEELING, WEST VIRGINIA. Letters Patent No. 70,935, dated November 19, I867.

IMPROVEMENT III LAMP-UHIMNEYS.

TO ALL WHOM IT MAY CONCERN: I

Be it known that I, E. R. ADDISON, of Wheeling, in the county of Ohio,.State' of West Virginia, have invented a new and useful Improvement in Lamp-Chimneys; and I do hereby declare the following to be a full,

clear, and exact description of the nature, construction, and operation ofthe same,suflicient to enable one skilled in the art to which it appertains to construct and-use the same, reference being bad totbe accompanying drawings, which are'made part of this Specification, and in which. the'same letters indicate similar parts, and the invention is represented by a ertical central section. 7

Supported above the flame, and upon the upper edge of thebulb, is a chimney, of metal or mica.

In the drawings, A is the glass bulb, inside which the red lines represent thewick B and the flame 0. Above the latter is a conical or trumpet-shaped tube, D, supported by a dome, Fhe tube D and demo]! may be made of metal, mica, or other incornbustible material, the lower margin of the dome fitting by aflange upon the rim of the bulb A, and the lower edge of the tube D extending down to apoint as near the flame as may be desirable. I v N To make the chimney operate in the best manner, it should be secured,=as shown, by a single circular line of attachment to the dome at a, by which only the heat in th e chimney will be conducted to the dome E, and the air rising against the bulb will revert in the mode indicated by th 'arrows, and tend to carrythe heated air continually towards the point of exit, (the tube D,) andabate the heat of the tube V By this device thebulb is less heated than when the chimney consists of one piece of glass, as the .heat is principally concentratedon the tube, and, so far as conduction is concerned, can only pass to the bulb through the point of junction with the-dome, and through the latter to-the top rim of the tube. By this arrangement there is much less aberration of the flame in moving about than in ordinary chimneys, and consequently less smoke, and what may be deposited will be principally on the tube D. The tube D maybe made to slide up or down, to increase or diminish the draught, or it can he made stationary in the supporting-dome E.

In William Starkeys lamp-chimney, patented'March 1, 18 64, a space is left between the upper end'of the dome and the inner chimney. The heated gases are thus caused to pass, not only within the metal chimney, but around it in contact with the glass,-thus heating andendangering breakage of the latter. By connecting the dome by joints, at both a and e, sufiiciently tight to prevent any free passage of air, I avoidthe difliculty above named. l v

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The combination with the glass bulb A of the metallic or mica chimney D, secured by tight joints a and e to the upper edge of the bulb, substantially as described and represented.

' E. R. ADDISON.

Witnesses:

CHAS.v BLACK, A. N. JOHNSTON. 

